Learn about the health risks, safety information and side effects of taking LEVITRA.
乐威壮levitrai，了解健康风险，安全信息和副作用的血管扩张药。
The research was funded by Pfizer Inc, known generically as tadalafil, and Levitra or vardenafil, sold by GlaxoSmithKline, Bayer ag and Schering-Plough, work in a similar way to Viagra.
这项研究是由辉瑞公司发起，分类上称为他达拉非、艾力达或伐地那非，主要由葛兰素史克公司，拜耳公司和先灵葆雅公司销售，工作方式与伟哥类似。
The research was funded by Pfizer Inc, known generically as tadalafil, and Levitra or vardenafil, sold by GlaxoSmithKline, Bayer ag and Schering-Plough, work in a similar way to Viagra.
这项研究是由辉瑞公司发起，分类上称为他达拉非、艾力达或伐地那非，主要由葛兰素史克公司，拜耳公司和先灵葆雅公司销售，工作方式与伟哥类似。
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